74ACT257SJ

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74ACT257SJ is a quad 2-input multiplexer with 3-state outputs, housed in a 16-lead Small Outline Package (SOP) per EIAJ TYPE II standards. It selects four bits of data from two sources using a common Data Select input, presenting the selected data in true form at the outputs. The device features noninverting 3-state outputs that can be switched to a high impedance state via the Output Enable input, facilitating direct interfacing with bus-oriented systems. It operates within a supply voltage range of 4.5V to 5.5V and includes TTL-compatible inputs.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-input multiplexer architecture with common data select control
• Noninverting 3-state outputs for bus-oriented system interfacing
• TTL-compatible inputs for broad logic compatibility
• Outputs capable of sourcing and sinking significant drive current

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented system data routing
• Multiplexer expansion by tying outputs together
• Logic implementation of 4-pole, 2-position switches
• Data selection between two sources for four-bit parallel transmission

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package variant M16D corresponds to the SOP configuration required for your PCB layout. Confirm RoHS compliance status through official manufacturer documentation as product specifications may evolve. Ensure the design accounts for the absolute maximum ratings regarding supply voltage and output currents to maintain reliability over the specified operating temperature range.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad 2-input multiplexer with 3-state outputs is required for 5V logic applications. The ACT series provides TTL-compatible inputs, making it suitable for interfacing with legacy or mixed-voltage logic families. Consider the SOP package dimensions if space constraints align with the EIAJ TYPE II footprint requirements rather than standard JEDEC SOIC packages.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the 74AC/ACT logic family, specifically designed as a quad 2-input multiplexer. The 'ACT' designation indicates Advanced CMOS technology with TTL-compatible inputs, offering improved performance over standard AC devices while maintaining backward compatibility. The 'SJ' suffix identifies the specific 16-lead SOP package variant manufactured under the M16D package number.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74ACT257SC serves as a pin-compatible alternative utilizing the SOIC package. Other variants include the TSSOP version (74ACT257MTC) and PDIP version (74ACT257PC). Verify package dimensions and lead pitch compatibility before substitution.